Automatic circuit-breaker.



H. W. CHENEY. AUTOMATIC CIRCUIT BREAKER. APPLICATION FILED 001222, 1906.

m. w L 0 2H 9 Patented Jul 20, 1909.

mam/5 'HwW. CHENEY. AUTOMATIU MRGUIT BREAKER. APPLIUA'UON FILED 0013.22,1906 Patented Jul 20, 1909.

a sns'rii-snnnr 2.

'imswxw Mar aux @whqz H. W. CHENEY. AUTOMATIG CIRCUIT BREAKERAPPLICATION FILED 001222/1906.

Patented July 20,

5 sums-SHEET 3 a Mm-MX Q wxvm CHENEY. F AUTOMATIUGIRGUIT BREAKER.AIPLIOATI'ON FILED OUT. 22,1906.-

H. W.-G-HENEY.' 7 AUTOMATIC CIRCUIT BREAKER.-

APIELIOATION VI'ILED OUT. 22, 1906.

Patented July 20, 1909.

5 SHEETS-SHEET 5Q 7 E I I I I p Z 1 1 I I I I I I I I I 1 I! Mwm/VM NMWXan m6 W I g 2 4 I HERBERT w; CHENEY, or NOItWOoD,OHIO,ASS1GNORTOALLIS-OHALMERS COMPANY, 'A'

. PANY, A 'OORPORATIONOF OHIOQ' 'I:

' CORPORATION. or NEW-JERSEY; AND frnn BULIQCK ELECTRIC MANUFACTURINGCOM- I Amounts] onscm'i nnnmn.

. 1N0. 928,901. I a

- es enti -m of Lette s Pa ent:

Patented July 20,; i909.

qepplioetiqn fleiQntober 22, 19,06. Serial No. 339,905.

anthem: may some: i

- woodygin" the county otHamilton'and State *ful Improvements inAutomatic Circuit- Breakers, of 'which the followingfis a fulhz clear,and exact specification-' ,Myinvention relates tofoil switches or ci .10-cuit breakers adapted either for: jmltorn'atiq or manual-operation.

On'e of the objeqtsofmy I .provide an, oil .switch orifcircu it breaker.which is'simpleinjeonstruction'elideitective gin' operation;

proved switch.operating nechanisrn.

l i i .A still .further object'gisfto provide n{ prov d-meansforadjusting the'position pf 1 the-armature of thetrippingfmagnet in theI 125- hutomatic'form oitimy switch;

from thej'fol- Other objects willappear, towing detailed. description.

1 Myinvention consists in cert "in novel'de ms ofTconstrnction' and thecombina ions and-arrangements of parts described in the pecificationand' set forth in the appended Fee etter understanding of my inven- .,tio11, referenceis had tothe accompanying wings infiwhich 'f' f 1 V Figureis'a partialsectional 'elev ation i l mechnnismfgli iig. 2 is anelevation my.i1n-- d; switch, part's'being in section. and ",away,itheview being taken from the 'ppqslte side tothat shown in Fig; 1; 'Fi 3isi- -n transverse section" through the swim 1 looking toward the rearof the switch" Fig;

'hanism and of a portion of the switch, witch-panel being shown insection Fig. sideelevation of the switch 0 ei'ating nism showing theposition of t e arts he switch .has been automatically Fig." 6 is asectional elevation ,lookg ivard the switch anel from. the rearshowihgfportion's of 't e switch o crating @meeh'e and" the trippingniec mism; Fig. janelevation o a manual switch I pliers ting mechanismshowing alsb lie it known'that 1,11 ii1:':'W;.CHn1-I-nr, c tizen of theUnited States, residing at Nor;

of Oh1o ,'have".inven t;ed' certain new and'use ,4"1S a plnn' view ofthe switch ope! sting l i V panel in section; Fig. 8 isagsection-similar 1 h1g1 haveshown at 10 a switch-board panel,

cover. for the-oil tank. The casting 12 is ;pro vided with downwardlyextending portions 13 and 14 on the sides and ends re- ;s'pectively.Bearing against the lowerex tremitieszof the casting 12 is anoil tank15.

. -made from-east; metal'such as iron, in. the

switch asiwill b'e'eXplained.-, The tank is supported on the uppercasting. in this instance 'by-three pivoted .bolts and winged nuts .16,17 and 18 mounted on lugs on the slots of lugs 19, 20 and 21 on theupper cast- It isseen from Figs. 2, 3 and4 that the Winged nuts 16, 17and slotted lugs 19 and 20 are on the sides of the switch ad- ;jacentthe panel, and the pivoted bolt and the end of the switch most remotefrom the panel. The tank is made from cast metal for the reasomthat inthe preferred con struction part of the switch elements are supportedthereb It is necessary, there fore, that tiretan after removal berestored v p p to the exact position that it occupied beforeirnprjovedgoil switch,- and o el ating 1 removal. For this pur ose Iprovide in one or-more of the slotted lugs which receive the pivotedtank retaining bolts, dowel-pins- 22 which en age sockets or recesses inthe lugs on whic i the pivoted bolts and winged nuts are pivoted. Afterthe position of the tank has once been ascertained, the dowch pinor pinsare secured in position. The tank can then after removal be easily andaccurately replaced to its proper position.

The switch is secured to the switch panel by bolts 23 which panel andthrou l1 ugs 2-1 on the end of the upper casting. heswitch here shown isa threehose switch but my invention is not limited to a switch for nthree-phase circuit. The top of the casting is provided with fiu'eepairs of terminal openings, the pairs portion ,Q'fthe SWltCh inelevation, and the switch. r

preferred construction ofinyswitch. This tank also serves to support.parts of' the 1pnss through the switch i'Lo Fi 3 showing a modified formof switch. I 5 Re erring now to the figures of the drawonv the rear ofwhich the oil-rswitch 1 1 is mounted. The switch is provided with anupper horizontal casting 12 which supports of the switchelements andforms the oil tank 15, the pivoted bolts fitting into winged nut1'8, andslotted lug 21 are on of openings being-arranged in lines success velyaway from the panel. Referring now 1 articularly to Fig. 3 it isseenthat in each air of openings are porcelain bushings 25 and 25 whichrest upon the-lop of the casting.- Mounted in the porcelain bushings aretwo sets of terminal rods 26 and 27. Each terminal rod 26 is provided onits lower end with a pair of nuts 28 and a collar 29. Be-

tween the collar 29 and the-top of the casting s a porcelain sleeve 30.At the top of the terminal rod 26 abovev the casting are a pair of nuts31, by means of which the terminal rod 26, bushing 25 and sleeve 30 arerigidly held in position. The nuts 31 also serve to clamp in positionthe terminal lead 32. The terminal rods 26 aresurrounded in this case byinsulatingsleeves 33. Secured to each terminal rod 27 at a suitabledistance from the casting 12 is a collar 34. Located upon the collar 34and the u per casting 12 is a sleeve 35 similar to the s eeve 30. At thetop of each terminal rod- 27 are a pair of nuts 36 by means of which theterminal rod 27, porcelain bushing 25 and sleeve 35 are rigidly held inposition. Between the two nuts 36 the second terminal lead 37 isclamped. Each terminal rod .27 is surrounded'by an insulating sleeve 38which rests upon the collar 34.

At 39 is shown a rotary contact drum which carries the movable switchcontacts as will be explained. As is seen, the drum is arranged at rightangles to the switchboard, and is mounted in the two downwardlyextending portions 14 of the upper casting 12. 'In this instance the endof the drum remote from the switch panel-is provided with a socket whichreceives a trunnion 40 mounted in the end of the casting as is shown inFig. 2 and the end of the drum adjacent the switch-panel is providedwith a socket which receives the end of a spindle 41 which is secured tothe drum by a transverse-pin 42. The downwardly extending end-portion140i the casting is provided on its outer side with a lug 43 having anopening through which the spindle 41 passes.

The drum 39 is provided with three equally spaced openings through whichpass three movable contact rods 44 which are provided at the up er endswith nuts 45. At 46 are shown which are clamped at one end between thenuts 28 on the lower ends of terminal rods- 26 and at the other endbetween the nuts 45 on rods 44. Contact rods 44 are each proexible leadsor connectors .lead 4'? secured thereto is seated in a recess 52 in thedrum, which recess partially closed by an insulating shield Thus it isseen that the live portions of the movable members are well insulatedfrom the live portions of the stationary members now to be described.

Mounted in the bottom of the oil tank 15 is a wooden or other insulatingbar 54 which rests on lugs fifnand is secured thereto by screws'56. Thisbar also extends at right angles to the switch panel and is locatedbelow the terminal rods 27. Secured to the insulating bar 54 by screws57, opposite the movable contacts 50 are three equally spaced contactfinger bases 58. Secured to each finger base by one of the screws 57 isa stationary contact member 59, consisting of a contact finger 60 and apair of upwardly extending spring jaws-61 shown most clearly in Figs. 1and 3. The contact finger and spring jaws 61 are integral with eachother and are preferably punched from sheet metal. At the end of eachcontactfinger 60, is a contact 62 adapted to be engaged by thecorresponding movable contact 50. The terminal rods 27 are longer thanthe terminal rods 26 and are provided at their lower ends with plugs 63which engage the contact jaws (31. The jaws (S1 and plugs 63 are soarranged that when the tank is raised in position each of the plugs 63engages a pair of contact jaws 61. The portion of each terminal rod 27between the collar 34 and the block 63 is surrounded by an insulatingsleeve 64.

The different poles of the switch are separated from one another andfrom the ends of the switch castings by vertical insulating barriers 65.Each barrier consists of two portions (35 and 65* which are in engagement with each other along the center of the rotary drum 39 the upperand lower portions each being provided with a semi-circular opening soas to fit closely around the drum adjacent circular flanges 39 integralwith the latter. The upper portions of the barriers are preferablysecured to the top of the casting by screws 65 and the lower barriersare preferably secured to the upper barriers by connecting strips 65 andscrews 65. The lower portions of the barriers are provided with notchedportions so as to fit closely over the insulating bar 54. The bar isprovided with flanges 59 adjacent the barriers so as to more completelyinsulate the poles from each other and from the ends of the castings. Ifdesired the lower portions of the barriers may be secured to the tanlkor bar 54 so as to be removable therewita.

I 13*. These openings so-form'e'd are preferv ably covered with*reinovable' sheet metal coverings (not shown) to r vent the oilvpreventdirt or sediment from entering thef' tank. The openings andremovable eovers 'or doors provide convenient means form-- specting thecontacts without removing the:

v sewer that the sides 13 of thenpperswitchcasting? 12 are partiallyremoved forming'openings from splashing out-of the tank; and also toHulk.- I i v The, automatic switch ,operating fmechane ism will now bedescribed. The outer ,end of the spindle 41 which is: secured totho endof the drain extends-throu h the lug 43 and provided at its endga jacentthe switch panel with a weighted lever arm 66,- p secured to the end ofthespindle 41 by a ,pin' 41% The weightedlever. a'rnr 66 which. is-

provided' with an enla-r ed outer end-66 jis )so-seured to thespind e41that when the switch is closedthe lever arm is siibsta'ntance from thelug'43 is-a' hi (57. Secured tofthe lug by screwsfiS is 'al which bearsupon the-'weightedlever and assists opening the. switch. This springmay; if'-desired,' be dispensed wit h'.-" Mountedin thetwo lugs- 43 and67 is a pin ;70 one end of which-preferably engages a, groove in theshaft to prevent a longitudinal movementthereof. Mounted on a. pin. 70-is a 4 bell crank lever 71 having at the endxof the upwardly extendingarm-a roller 72'mounted on a transverse pin 7 3c, whichroller is sub'-.stantially in line with the axis of the spindle.

" ll-{and drum 39 of the switch. The oppo- 1 second arm' 8Ov of the sitearm of the bell-crank lever 71 is provided with a slightly enlarged endTshown in dotted lines' This end 74 of the arm of the bell-crank leveris located inla hollowed. v or recessed portion of the Weighted lever.located ,between t-heenlarged end ofthe" ever arm d r I roller 727 onthe"end of the arm 'ofthe bellv arm 66, the recess portion hem and thespindle' ll as is. shown-in Figs. 1

and 4'. Thus it is seen thatif the bell-crank. lever is rocked about itspivoted'center that s the weighted. lever; sesame hence the rotary drum39 are also rccked'orv rotated.

Pivoted at75'in a. casting '76Vwhich is secured to ,the frontofithe'switch-panel'10, is a switchoperating handle Secured-to theoperating handle is 'onearm 78' of the" toggle. Pivotedtothearm- 78-at-79 is the extends through a I panel and h'a's'a 'fre; titer-endadjacent the switch; The andto'ggl mech-v anism are so rrange h of thearm "80 is provided with an-inclined noseshownatfil. 'In line with-thearm 80 and in path of moven'ient with the inclined rti 'on83, isanadjustable screw 84 secured i to the top. of the h1g3? adjacent the end14 of the casting The will" be explained later;

eaf spring 69 willappe'arlateri g e-j The ar 30 g in the, switch is?heee i e slot. 81 wl 1ich is adapted to receive the roller 72Jupon theupperend of the arm of the bell-,crankdever 71-h One' side ofthis' slot,

81 extends downward substantially in a straight, line, while theopposite side is partly inclined as is shown at 82-; -.The -endpurposeof this screw .:'.jL0cated= on the rearside oil-the" switchp'an'el andsecured thereto by screws or bolts ;-is a frame .or casting-" 85 far thetripping mechanism. astmg i's provided with a rearportion in engagementgwith the panel,

with twohorizontal gprojeetions' 86- forming 'hand-le 77 =and thejarms78 'andSO .ar'e sub stantially in linewith theaxis 0fthe switch drum.The outer free end of the armSO is provided-- on its' 'under;,side-Withan op n 70 (ores forztrippi'ng"coils- 87, and a forked horizontalportion ms and; with, a d0wnwardly extendin jlugSQ;

casting on'a horizontal pin-or spindle 90 is a pivoted armatiire glhavihgan enlargedpor tion 92 adaptedto-be, drawn into engagement withthe-cores oft-the tripping magnets, and

:a' projecting portion Qhthe purpose of which The-armature is also pro'vided with-two arms, through the lower ends; t of which-passes thespindle 90 as is shown in Figs 1 and '6 Alsomonnted on thejpin or 90Mounted between, 1 s the a'rms'of the orizontal portion 88 ofthespindle90,-is a 'movable'latch 95 having at i one side a? weightedportion 9'6] "and "onthe' normally in engagement with the lower side =01a bar' 98- ektending between the arms 88 (at tl1e"cast ing, 85. Thepirated latch 95 is ale-3' provided on i Ls lower side with a projection99 which is recessed or forked at its lows-rend in'wliich forked-portionis mount,

crank leverin engagement with each other I when the 'switchis closed.The lug or proplain d 'acts as a stop to limit the upwardniovementbifthetoggle arm when; the switch is opened.--

ping coils, sothat-the'switch can be caused to open at ahyfldesiredfpredetermined line condition, Onithe front ofitheswitch-board oppositeside m finger 97 located beneath and I p U ed a srnallrroller 100which'is adapted to be I med laterthe purposeof the jeotisnfifi'on thelewer side of the casting or 5 s frame 85tis'1directly'ab0ve the togglearm 80 'and'is provided on its lower side with an ad "justable, screwc102, which-as will be exc .Ivh'av'e" ravided novel means for adjustingpositlon ofthe ari'nature 91" of the trip;

opposite the tripping coils 87 is a plate 104. Extending through anopening 105 of the switchboard panel is a tube 106 supported at one endby the plate 104 at the front end e1" the switclrbmird. and by thecasting 85 at the rear of the switch-board. Located within the tube andnear the front end thereof is a short rotary plug or spindle 107. The.spindle is provided with a groove 108 'which is engaged by a. pin 109extending through the wall of the tube 106 so as: to permit a vided witha tongue 112. Extending from the rear. end of the tube and beyond theends of the tripping coils is a second spindle 113. This spindle isprovided with a slot 114 into which the tongue 112 extends and is alsoprovided with a spiral groove 115 engaged by a pin 116 extending throughthe wall of the tube 105. The rear end of the spindle 113 is threadedand is provided with an adjustable nut or collar 117 against which thearmature 92 normally rests. It is seen that when the spindle 107 isrotated, both rotary and longitudinal movements are given to the spindle113. Thus the position of the armature can be adjusted by revolving thecrank 110 The operation of the switch and switch operating mechanismwill now be more fully explained. In Fig. 3 the switch is shown in 7 itsopen position, and in Fig. 5 the switch operating mechanism is shown inthe position when the switch is open. It is seen that the weighted leverarm is below its horizontal position, the roller 72 rests on the togglearm 80 out of the slot 81, the outer vtree end of the toggle armisrais'ed above the opposite end andis inengagement with the screw 102,and that the operating handle 77 is at anangle of about with the switchpanel. Now if it is desired to close the switch the operating handle israised to the horizontal position shown in dotted lines in Fig. l t-husmoving the toggle arm 80 forward until its slotted end drops down overthe roller 79 on the end of the bell-crank lever. downward into theositionshown in full lines in 1 m'ov'mg the toggle arm 80 rearward,rocking the bell-crank lever about the spindle 70, raising the weightedlever 66.

and hence rotating the contact carryii'ig 'n to it: closed position. Asthe switch in le and toggle arm are near the comp.

at the stroke, the inclined portion .1.

The switch handle is then thrown the roller 100 is to hold the togglearm and bell-crank lever into the position shown in .Fig. 1, forotherwise the switch could not be held in its closed position. Now incase of an abnormal line condition such as overload in the maindistributing conductors, the armature 92 of the tripping magnets isattracted by the coils and the projection 94 strikes the horizontalfinger 97 of the latch with suflicient force to rock the latch 95 aboutits pivotal center, and thus moving the roller 100 away from theprojection 101 on the toggle arm, permitting the arm to be thrown upwardby the pressure of the bellcrank lever arm due to the weight 0 and thespring 69 and permitting the weight to drop and the switch to be opened.When the toggle arm is thrown upward it strikes the screw 102 causingthe operating handle to be moved outward to the position shown in Fig. 5which position of the handle serves as an indication that the switch isopen. Thus it will be seen that the arm 80 and the bell crank lever 71together with the roller 72 which is carried thereby and is adapted toengage the notch 81 of the arm 80, constitute a separable connection orcoupler bet-ween the operating handle 77 and the switch. It will be seenalso that when the e arm 8 "g.i 'estl1e screw 81 nu; :rflg movement ofthe handle, i sli ht relative movement is a between the parts of t ecoupler-or a partial the projection 101 on the arm 80, totaldisengagement or separation of the parts of the coupler occurs.

In Fig. 7 is shown. the switch operating mechanism adapted for manualoperation alone. The manual operating mechanism is similar in the maintothe automatic operating mechanism first described. As is in the firstcase the switch drum is adapted to be opened by a weighted lever 66which in this case however. must be released by hand and notautomatically. The operating handle and toggle arms are shownrespectively at 77, 7S and 80. The outer free end of the toggle arm 80is provided with a slot 81 and an inclined portion at the forward sidethereof and with an inclined end 83, adal' te rl to engage the screw 81in substantially the same manner as first described.

i In this case. the upper casiing 1; is pro- ".idcd with a forwardlyextending big or E projection 118 which some: to hold the logv themanner Ofsupporting, the stationary Lcontacts.

"-pletion gle arm and roller and-the bell-crank leveljin position; {Ihemoving the. hand1e' ,first -to position and then itotheposition Fig. =7,asinthe' fir stcase of-Ithis stroke of the:

own in screw 84* and the toggle arm-is lifted a short ifo ' distanceupjwardgaway iromfthe roller 72 until the 1' ar upward. end ..of the armone, gages the'lo '118. When it is desired to op'enthe switch ersideof-the lugor projection the handle m'o'vedamanually outward, a

suflicient*distance to move the end of the a. lower side ofthe lugendogf the togglearm' 118 hebeH-cranklever throws the lever arm togglearm out of engagement with the 118. Atthe instant the upward and theswitch g g is opened by the weight and sprm i tion thatthe switch isquickly opened, the hand operation-differing from the automatic 1- ofthe switch. The. its essential.- points" operation merely infitherelease of the toggle arm and bell-crank leven; f

- In Fig. 8 I have-shown ajmodifiedform I switch here shown is insimilartothe's'witch first described, the-main difference being In thiscasethe'la'tter are supported from the upper casting independently ofthe-switchtank, which can there for be removed without'disturbing thecontact s. Thej-switch casting 1 19 supports.the tel'l ninalirods 120,121 in substantially the sa. emanner-as the terminal rods 26 androvided' at its lower orcelain sleeve 123., Secured to .the lower sideof the base122 by a screw 124 is a flexible contact finger 125 whichsupports a stationary contact 126. At 127 is shown a rotary drunrmountedin lugs 128 (only one of which is;shown) extending downwardly from thelower partof the casting 119/ The drum is provided on opposite sidesvwith recesses in which are-located nuts 129 and 130, which clamp themovable contact rod 131 into position. A flexible. lead 132 connects themovable contact rod 131 to the terminal rod 120 as in the firstconstruction.- Each contact. rod 131 is provided on its lower end withmovable contacts 133 adapt-ed to engage a stationary contact 126.

The recessin the upper part of the drum which receives. the nut=129 ispreferably filled with cement 134 after the contact rod 131 is tightenedin position. Each flexible terminal l32 -and .nuts 130 are preferablypartially surrounded by an insulating shield .135. The purpose of thecement 134 and shield 135 is to protect the live parts on the movablemembers and prevent flashing beswitch: is closedby the fh-orizontal.Nearthe comtoggle arm '80 forward ncl ned end 83 engages the.

ments for.

moves beyond the lug ,It is-seen that both in hi I OIISLIII i Yg hnd inthe first construe stantially at ri ht-angles to the switch shown inFig.3. Each of the terminal /rods 121 however is g,

end witha base 122w 1ch rests against the .movable contact members,

tween suchstationary lower side 136 made drum- -'12 7 1isadapted. to beoperated .in exactly the 'saine mannera drum 39 of the firstconstruction.

of thecasting- 119-is an oil tank preferably from'sheet metal. The oparts and the. live part sot the I contact. members Secured to the"From-the above itis apparentthat I have i devised a. simple in. will.also high voltage switch which is construction and operation. Itbeyseen, that since the compart- 111 a lineat right angles to-theswitch-board that; the "width of a .two' or three phase switch isnogreater than fora single phase switch, and therefore the switch can beeasily applied to narrow panels. It, is also the difierent phases'arearranged apparent that. many alterations can be made i in thefswitchmechanism-and construction without departing from' the spirit andscopeof my invention. I therefore do not wish to be limited to the detailsshown but aim in my claims to cover all such altera- In combination, aswitchboard, an oil QSWllZCh on the rear thereof, said switch havsaidlongitu'dinally movabe rod pivoted to the handle.

2. In a rotary Oll switch, stationary and movable contact members, arotary drum on which the" movable contact member is mounted, a weight onsaid drum for openingthe switch,- and means for closing. the switchcomprising an operating handle and said weight.

3. In a rotary oil switch, stationary and, a rotary'odrum on which themovable contact member is mounted, means" including an operating handleand a lon itudinally' movable rod for turning said d rum in onedirection to-close the switch, means for causing said rod to becomedisengaged from said .drum, and means for turning the drum in 'theopposite direction to open the switch.

4. In a rotary oil switch, movable contacts, an oil receptacle inclosingthe contacts, a rotary. drum on which the movable contact is mounted,said drum havstationary and r10 mechanism connected to said handle and.to n w ing an end extending outward from the receptacle, means exteriorto-said receptacle for turning said drum in one direction to close theSwitch, said means including a hantary drum on which the movable contactis die and a longitudinally movable rod arranged to be placed inoperative relation with said end of the drum, and means for causing theconnection between said drum' and rod to be broken so that the drum canturn in the opposite direction to open the switch.

In a rotary oil switch, stationary and movable contact members, arotarydrum on which the movable contact member is mounted,means including anoperating handle and a longitudinally movable rod for turning said drumin one direction to close the switch, means for causing said rod tobecome disengaged from said drum, and a weighted meme her on said drumfor openingthe switch.

In a rotary oil switch, a supporting frame, stationary and movablecontacts, an oil receptacle inclosing the contacts, a romounted, saiddrum being journaled in the frame and having an operative end extendingoutward from the receptacle, means exterior to the said receptacleincluding an operating handleand a longitudinally movable rod adapted tobe connected to said drum for turning the latter in one direction toclose the switch, means for causing the connection between the rod anddrum to-be broken, and a weighted member on said drum for opening theswitch.

7. In a rotary oil switch, stationary and movable contacts, an oilreceptacle inclosing said contacts, a rotary drum on which the movablecontact or contacts are mounted, said drum having a portion extendingoutward from the receptacle. a weight mounted on said outwardlyextending portion of the drum, means including an operating handle andtoggle arm adapted to be connected to said weight for raising the weightand for turning the drum to close the switch, and means whereby theconnection, between the toggle arm and weight may be broken so thatthe'drum can be turned by the weight to open the switch.

8. In a rotary oil switch, stationary and movable contacts, a rotarydrum on which the movable contactis mounted, an arm extending outwardfrom said drum, means including an operating handle 'and togglemechanism connected thereto and arranged to be placed in operativerelation with said" arm for turning the drum in one direction to closethe switch, and means for causing said toggle mechanism and arm to bedisconnected whereby the drum can turn in the opposite direction to openthe switch.

9. In a rotary oil switch, stationary and movable contacts, an oilreceptacle inclosing the contacts, a rotary drum carrying the movablecontacts and having a portion extending outward from said receptacle, anarm secured to said outwardly extending portion of the drum, meansincluding an i operating: handle and toggle mechanism adapted to beplaced in operative relation with said arm for turning the arm and drumto close the switch, and means whereby the connection between said armand the toggle mechanism may be broken, so that thedrum 7 dan turn to 0en the switch.

10. vIn com ination, a switch-board, an oil switch mounted on the rearthereof, said switch comprising a frame having downwardly extendingportions, a rotary drum or shaft at right angles to the switch journaledin said downwardly extending portions of the frame, said drum having anoperative end extending beyond one of said downwardly extending portionsand located betweenthe latter and the switch-board, a plurality ofmovable contacts mounted on said drum, an operating mechanism formoving. the drum in one direction to close the switch comprisinga handlepivoted to swim toward and away from the switch-boar and means formoving the drum in the op posite direction to open the switch.

11. In an oil switch a rotarv drmn or .1 spindle carrying movablecontacts, an oil re- ,ceptacle inclosing said contacts, said drum havingan operative end extending out-ward beyond the receptacle, an operatingmechanism exterior to said receptacle for moving the drum in onedirection to close the switch, means for causingthe connection betweensaid drum and the operating mechanism to be broken whereby the drum canturn in the opposite direction to open the switch.

12. In an oil switch. a supporting frame, a rotary drum journaled insaid frame, a plurality of movable contacts mounted on the drum, an oilreceptacle inclosing the contacts, said drum having a portion extendingoutward beyond the receptacle, an operating mechanism including apivoted handle and a longitudinally movable rod connected to the handleand in operative relation with said outwardly extending portion of thedrum, the axis of the drum being in the plane of movement of theoperating handle.

13. In an oil switch, a rotary drum carrying movable contact members, anoil tank inclosing the contact members, av portion of the drum extendingout-ward beyond the receptacle, and an operating mechanism ineluding anoperating handle and a longitudinally movable rod in operative relationwith saiiflnoutwardly extending portion of the drum'fthe axis of thedrum being in the plane of movement of the longitudinally movable rod.

14. In combination. a switch-board, an oil switch mounted on the rearthereof, said switch comprising a rotary drum at rightangles to theswitch-board, one or more movable contactsmounted on the drum, an oilreceptacle inclosing the contacts, said drum having one end extendingoutward beyond card and lG I-I'n. combinationfa switchboard, an oilswitch on the rear thereof, saidsvvitch having l t eh 'eceptacle toward"the a lateral arm or; extensiononjsaid outer end of the drum-and movabletherewith', an operat.

I thereto, and. me 'ans for transmitting the ring mechanism including a1pivoted handle, a longitudinally movable' rod connected I lnOVlneIlil ofsaidf rod to said lateral arm or 'GXtBll SIQIL' EQ 4 i g n '15. "Incombinat on, a: svvitch board, an oil ..1 f

switch mounted onI-the" rear thereofjsai'd.

- switchoomp'rising a rotary- [drum at right Tangle-s to'thes itchboard, one or more Imov- 1 .thereto, and means comprising a bell-cranklevergconnected to saidlater'al arm or extension for. transmitting the"movement of fable contacts mounted on the drum, an .oil

7 receptacle inclosing said contacts, said drum. r I ,havi'ngon'e'endextending outward-[beyond j the receptacle toward "the switch-board, a

' I i'lateralarm orextens'ion" onsaid outer end of the drum and. movablethereyvith, ano'perat- "ing. mechanism including a pivotedhandle andalongitudinally movable rod connected a rotary'drumat right angles; tothe switchrod c'onnected to said handle, means connected to said drumand arranged "to be placed in locked engagementwith' said rod soithatsaid drum canbe turned in one di-' mg a rotary drum. at right answitch-board, one or more mov.

f rection toe-lose the switch'bya movement of 'Stlld. handle; and tobereleased from said rod to permit thedrum to turn in theoppositedirection to open the switch. l

17. In combinatioma switch-boarder switch mounted onthe rearthereof,said sWit h havq'les to the lile contact members mounted on the drum,.anoperating mechanism including a pivoted handle on I the front :of theswitch-board, a longitudinally movable rod connected to said handle.

a 'jal'ever connected to said drum and ar 'anged to'be placed inlockedengagement with said arm so that said drum can be turned in onedirectionand the switch closed a movement of the handle, and to bereleased therefrom so that said drum can turn in the op- 'positedirection and the switch opened.

18. In combination, a switch-board, a switch mounted in the rearthereof, said switch having a:r0ta ry contact drum at right. angles tothe switch-board, an arm or extension movable with said drum, abellcrank leveree ngaging said arm, operating mechanism including alongitudinally movable rod adapted to engage said bell-crank lever tomove the drum in one direction to close the switch and to be disengagedthere- -;b oard, one or more'mo'va le contactsjcarr'ied by th? drum, anoperatngmechanismin eluding a pivoted handle on the front of theswitch-board and a longitudinally movable 9 eas gem] saidrod to saidarmor extension and to said for closing the switc 9F 3 i T oppositedirection to open th switch;

19. Ina switch or'circuit-breaker, stationary and movablecontactmembers, an oper-E sting mechanism including longitudinallymovable arm or rod, a movable-; -member adapted to be enga ed by saidarm or rod hand means adapted to be; engaged by'saidarm or rod in-itsfor-,

ward movement. for causing a slight .prede -froin to tli'e drum tobetautomatically terminedl relative pmovement between said.

arm or rod andsaid member so that said arm orrodandmember-may bedisengaged permittinglthe switch to be quickly opened. I 20;;In 'asWitchor circuit-breaker, an-op-. "era-ting mechanism including a toggle armhavin an 0 en slot in one side a. movable switch member, a lever armconnected there'- to adapted to engage the slot in said toggle .armwhereby the switch can be closed, a projection in" the path ofsaiditoggle arm to raise the latter a predeterminedamount relative tothe leverarm, a stop for limiting the upward movement of said togglearm, said and toggle arm being relatively movstop able whereby thetoggle arm and lever arm.

can be thrown out'of engagement witheach "longitudinally. a movable stopfor holding the toggle arm in engagement with said level-farm,- andmeans for moving the. stop relative to said toggle arm to-permit theconnection between said toggle arm and lever arm to be broken, wherebysaid switch member can turn to open the switch.

22; In a switch or circuit breaker, aswitch member rotatable about itsaxis. contacts for a plurality of poles carried by said member.

a pivoted lever operatively connected to said member, an operatinghandle, a toggle arm connected to said handle and having a separableconnection with said-lever. a movable device adapted to hold the togglearm and lever in engagement. and means for autoy matically shifting saiddevice out of engagement. with said toggle arm wherebythe drum is freeto turn to open the switch.

23. In a switch or circuit-breaker, a movable switch member, switchoperating mechanism comprising a lever and toggle arm. said toggle armhaving an open slot 'to receive the lever arm. means for moving thetoggle arm longitudinally to close the switclt.

means for causing a slight relative movement of the toggle arm relativeto the lever near letion of its longitudinal movement,

the comp means for holding the lever and toggle arm in engagementcomprising a pivoted latch above said toggle arm and engaged thereby,means comprising a tripping coil and armature for moving the latch outof engagement with the toggle arm, and means for opening the switch.

524. In an automatic switch or circuitbreaker, a tripping coil, anarmature therefor. and means for adjusting the position of said armaturecomprising a spindle having a spiral. groove, a stationary pin engagingsaid spiral groove a regolnlole wadjusting member, said member andSpindle having a loose connection. whereby a longitudinal movement canbe imparted tosaid spindle by the rotation of said member.

In combination, a switch-board, an automatic switch secured to the rearthereof, a tripping coil, an armature for said coil, and means foradjusting said armature comprising a spindle normally supporting atitsouter end said armature, a-tube extending through said switch-board,said spindlebeing located in said tube, said spindle having a spiralgroove. a pin extending inward and engagingsaid groove, a second spindlewithin said tube, means for rotating said second spindle from the frontof the switch-board, said spindles having a loose connection, whereby alongitudinal movement is imparted to the first mentioned spindle by therotation of the second mentioned spindle.

26. In con'ibination with a switch, an operating mechanism comprising ahandle and a couplcr through which said handle may operate the switch,said coupler comprising two parts which are connected together indriving engagement when the switch is be ing closed by a n'ioveinent ofsaid handle, and means for causing a slight relative movement betweensaid parts of the coupler durin g the said movement of the handle, sothat alter the switch is closed said parts are biased towarddisengagement.

27. In combination with a switch, an op crating mechanism comprising ahandle and a coupler through which said handle may operate the switch,said coupler comprising two parts which are connected together indriving engagement when the switch is be ing closed by a n'iovenicnt ofsaid handle,

nicans 'lor causing a slight relative move ment bet ween aid parts ofthe coupler during the final closing movement of the handle so that saidparts are biased toward disengagement after the switch is closed, andmeans lor normally preventing the disengagement of said parts. I

28. In combination with a switch, an operating mechanism comprising ahandle and a connection through which said handle may operate theswitch, said connection comprismg LYO parts which are 111 drivingengage- 'mentwhen the switch is being closed by a movement of saidhandle, means for causing a slight relative movement between said partsof the coupler during the final closing movement of the handle so thatsaid parts are biased toward disengagement after the switch is closed,and a latch for normally preventing the disengagement of said parts.

29. In combination with a switch, an operating mechanism comprising ahandle and two members, one connected to the handle, and the other tothe switch, said members constituting a coupler and being connectedtogether when the switch is closed by a movement of the handle, meansfor causing one oftlieparts of the coupler to be moved to a posit onsuch that it tends to move out of engagement with the other part; of thecoupler, andmeans for normally preventing the disengagement of saidparts.

30. In combination with a switch, an operating mechanism comprising ahandle and a separable coupler through which said handle may operate theswitch, said coupler comprising two parts, one having a notch and theother a projection which engages said notch while the switch is beingclosed, and means for causing a slight relative movement between saidprojection and the part having a notch so that said parts tend to moveout of engagement, said relative movement taking place during thefinalclosing movement of the switch handle.

31. In combination in a switch operating mechanism, an operating handleand two ,members, one connected to the handle and adapted to shift theother, said members constituting a separable connection, and one havinga notch and the other a projection, which, when in full engagement withsaid notch, permits one of said members to be shifted by the other,means for causing a slight relative movement between said parts ormembers of the coupler during a final movement of the handle in onedirection, so that said parts are partially disengaged, and means forstopping said relative movement and for holding the parts of the couplerin positions such that they are biased toward total disengagement.

32min combination with a switch, a switch operating mechanism comprisinga handle and two members, one connected to the handle and the other tothe switch, and

the two forming a separable connection, one

of said members having an open notch and the other a device which isadapted to engage said notch when the handle is moved to one positionand to remain in engagement therewith while the switch is being closedby a further movement of the handle, and a meniber for causing saiddevice to be moved partially out of said/slot during'the final closingmovement of the handle, to a position switch operating, mechanismcomprising a handle and two members, one connected to Zfthe handle andthe other to the switclnisuid members forming a separable connectionandon'ehtving anopen notch "and the other "a device which isadapted toengage said notelt when the handle is moved to one position and toremain in engagement therewith While the. switch is being closed. by afurther Letters N o, 928,901;

Corrections m v v movement of'the handle, a member for. causing said'deviee'to' be mov'iadpartially out of the Patent Oi fice;

the occilrrence of a in the presence of two Witnesses;

' Witnesses:

' i Signed ahcl sealed this7th day of Sentember, A. 1)., 1909.

said slot-during the final closing movement of the handle, ton positionsuch that said device tends to emerge from saiclslot and permit said"members of the separable connect-ion'to move relative to each other, anda .movable member for preventing movementof 'saidiftievice from thenotch until after predetermined abnormal line condition.

' In testimony whereof I effix my HERBERT W. CHENEY.

' ARTHUR F. Kwls', FRED J. KINSEY.

. It is herehy eentifi edthat in Letters Patent No, 928,901, grantedJuly 20,1969,

npon the application ofHerbert W. Cheney, ofNorwood, Ohio, for animprovenient in Automfttic Qireuit-l3 rezthers,, errois alppe ztr in theprinted speeificzttion requiring I ioo'rreotion, as -f0ll0WsfIn line'20,page 5, after the word weight the hefe 'en'c e- Y 1 nnnie r al and words66', bitty the' weight. shoultl be inserted; page 6, line 99, the wordsif can tutti Should read can'be tamed and that the said Letters Patentshoul d be read with these correetions'thereinthet the same mayeonforin' to the record of the case in F. AJTENNANT',

Acting Commissioner of Pqiens.

signature,

